a {
    // Black pixel
    background-image: url();
    background-position: left 1em;
    background-repeat: repeat-x;
    color: $color-text;
    text-decoration: none;
    text-shadow: -1px -1px 0 $white,
                  1px -1px 0 $white,
                 -1px  1px 0 $white,
                  1px  1px 0 $white;
    transition: all .25s;

    &:hover,
    &:active {
        // Transparent pixel
        background-image: url();
    }

    &.btn {
        background-image: none;
        border-radius: 3px;
        outline: 0;
        text-shadow: none;
    }
}
